Shank and bit punch



Julyl 6 1926. 1,591,408

M. sLATl-:R

SHANK AND BIT PUNCH Filed August 20, w25

, & f.

INVENTOR 'f' Efedu sigas@ ma ATTORE l Patented 41926; i

Y Y FRED'M. sLA'rnn,v or,nasroliigriinivsrmmnie, AssieNoR-ToinennsorrniinncoM. i

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i ii'iventionji's applied (to both the lpush punch and the hammer punch type/lof machine.

This invention relates toi i l'and'fbit Y punchesV for yopening the' bores' lof. houw mi; ticles as for instancedrillsteels, `and 4the ln' the pushj punch type the punch' i pin" is vpushed or forced into the 1drill steelr by vsteady pressure l,applied mechanically or by Vpressure"fluid means'rand: pulledout by fthe i same '.means, 'while "Linltlie fhammer "type punch 'the [pin is i, hammered into the drill steelby blows 'in one*direction' [and ham mered out of thedrillsteelbyblows the opposite. directioni' f These 'blows in opposite, directionsk maybe repeatedly. applied or :one

Vblow may be sufficient tofdrivefthe' pin into y. the steel and anotheifnblow 'may 'besufhcient toy drive the pin out'o'f the steel,"the :nuin

' ber of blows dependingupon the :resistance vtothe entry'orwithdrawal ofthe pim 'A y The oblecfsi: Ofbhe ,invention "arefto ,Simplify the Construction-of such, machines y and rin the ca'seofthehainmer APunch'seg with-drawingit rearwardly whilethe halnf mer is in action.

cure a simple and eilicient feeding device for feedingl the fpin* punch forwardly and The invention is shown inV some of its preferred forms in the accompanying drawings, in which'- t f Figure, l is va side ,elevation partly lin longitudinal section of a machine,

Figure 2 is "a similar view vshowing amodification, and l Figure 3 is asimilar view hammer punch type of machine having an airfeed Referring to the drawings which are diagrammatic, the base-A,y which maybe the basev of a drill sharpener'or a bracketaty tached'theretoor a separatepedestal, has provided in connection therewith the clamping -mainjaws of vthe Sharpener, supplemental Vjaws beingw provided atone sidefof the sharpener for holding the drill steelgand these supplemental jaws may be the jaws .sem ArD-eifflm showing the fseialiivp.` tasca) I l tion. y Y y onf-the frame 'or bracketjA l isJprOvi'ded indicated@ linf ifiie drawigs'ef jfiiisjappiiall ,5, V l

tlfecasing vFfcontaining a: sui'tablereversible motor 'l of v`any' suitable yin g lthis?inl stance shown'V as,v a fluid", actuated gear motor comprising the gears G :and Hf for v actuating the pin punch Jxforwar-d'ly and rearwardly. A. y

rpiirQ, i A `pinion uRiconnectedfto;fthe f4" the rack and; l' as vthe y pinion SR f is rotated ing" opposite 'directio'ns according to, the 1 dil.

kl/.Cston of l'rotation'of 'the"gea1'jH,"`thefrack w l( will `he" carried rearwardly fand forwardly y;

Vtvionofth'efparts 'indicated in Figure l" 'pressure `fluid passes the passage'V to thef'ino'tor casing and drives the gears G and H1 in the direction indicated-Eby the arrows so that ,the` piniony R isy driven counter-clockwise and the punch pin is carried into the 4drill steel. By reversing thevalve T pressureY The motor casing is provided withVV .p fivuid enters the motor casing through the o inlet port X and the direction of the motor, v

this apparatus the puncli'pin is quickly and` forcibly' pushed or carried into the .drillA steel and quickly Withdrawn by manipulation of thevalvelever'U. Y y 1 In the modification shown in Figure 2, the

construction of the motor V is similar to that indicated in Figure l but instead of av rack bar, a screw Z is provided for carrying vthe Y `pin J, and a worm a on the shaft S of the.

gear;` H meshes with,A the worm gear b mounted in the casing F. The worm gear b has an internalgear engaging the screw bar Z and a key 0in the guide O- engages a longitudinal slot ci in the screw bar Z, `so

gitudina'lly forwardlyA or rearwardly and 10|;v that rotation ofthe worin gear b in one difV rection or the other carries the screw Z lon-i J receives blows of impact in. one direction orranother to hammerthe pin into they drill steel and hammer the pin out of the drill steel asl disclosed in 'said Haight patent.

For r'feeding the hammer punch forwardly ,and rearwardlyav suitable reversible motoris providedin'the casing h., in this instance a pressure fluid motor ofthe gear type being illustrated vlike that shown in the other figuresY vThejpinionmR connected to the shafty S `with 'the gear engages a rack having Va reduced shank lloy passing through the boss o on thejcasing f; Ay nut p and lockznut g on'the .shank ,7cy permita given amount of play'betweentheboss o and the collar 7 and nut p. Pressure huid for lactuating'the mo- V4tor in the casing 71, iscontrolled by a suitable 'valve (not shown) actuated bythe handle s andspressure fluid for actuating the hammer ofthe hammer punch is-admitted throuo'h the connection ft and if desiredfthe supplly yof pressure vfluid to the hammer punch may vbe `controlled by thesame valve aand handle ls .which controls the supply of Huid to the motor. Y

1,591,408 p A I.,

In the operation of the device shown inV Y Figure 3, the rack'j is forced forwardly whenthe'motor rotates in one direction to feed the hammer punch forwardly whilethe hammer is! vin action. Upon reversing -Jche gear motor the rack j'is carried rearwardly and owingV to the lost motion' connection between the shank k and the boss o, the moj tor may attain maximum speed before its force is applied to the hammer punch, so that asharp blow is given to theboss and 'a casing f by the nut ,p inV order to start the withdrawal of the pin J from the drill steel, it being understood that the hammer '-remainsin action to hammer'fthe pin out of VVthe drill steel While the hammerr punch is being withdrawn.l

Iclaim: v Ina shanli and bit punch, the combina- .tion ofineans forclamping a drill steel,z a

hammer punch having a pin adaptedto be hammered into the drillsteel and hammered out of the'drill steel, a basela fluid actuated reversible motor secured fiXedly on said vbase5 and l'operativeconnections including a rack` connectedv at one end to lthe hammer punch 'and a gear carriedv b y the motor to mesh with the rack for moving lthe hammer punch forwardly and rearwardly while the hammer is in action, saidoperative connections including a lost motion lconnectionbetween themotor andthe hammer punch.,m l In testimony whereofI have signed this l specification.

FRED ML s LATR. 

